Test Code BLOD1390
Testosterone, Total and Free, Serum

Additional Codes

Mayo Code: TGRP

Useful For

This assay is the alternative, second-level test for suspected
increases or decreases in physiologically active testosterone
(preferred: TTBS / Testosterone, Total and Bioavailable, Serum);
indications:

-Assessment of androgen status in cases with suspected or known
sex hormone-binding globulin-binding abnormalities

-Assessment of functional circulating testosterone in early
pubertal boys and older men

-Assessment of functional circulating testosterone in women with
symptoms or signs of hyperandrogenism, but normal total
testosterone levels

-Monitoring of testosterone therapy or antiandrogen therapy in
older men and in females

*Puberty onset (transition from Tanner stage I to Tanner stage
II) occurs for boys at a median age of 11.5 (±2) years and
for girls at a median age of 10.5 (±2) years. There is
evidence that it may occur up to 1 year earlier in obese girls and
in African American girls. For boys, there is no definite proven
relationship between puberty onset and body weight or ethnic
origin. Progression through Tanner stages is variable. Tanner stage
V (young adult) should be reached by age 18.